From d8ce303b14f6c7e0c9f0ec37781404d735476d62 Mon Sep 17 00:00:00 2001 From: Luc Van Oostenryck Date: Mon, 12 Dec 2016 16:29:01 +0100 Subject: [PATCH] unssa: update comment about the unneeded copies Signed-off-by: Luc Van Oostenryck Signed-off-by: Christopher Li --- unssa.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/unssa.c b/unssa.c index a7085ca0..e7c9154d 100644 --- a/unssa.c +++ b/unssa.c @@ -15,10 +15,14 @@ * as the corresponding OP_PHISOURCE. * * While very simple this method create a lot more copies that really necessary. + * We eliminate some of these copies but most probably most of them are still + * useless. * Ideally, "Sreedhar method III" should be used: * "Translating Out of Static Single Assignment Form", V. C. Sreedhar, R. D.-C. Ju, * D. M. Gillies and V. Santhanam. SAS'99, Vol. 1694 of Lecture Notes in Computer * Science, Springer-Verlag, pp. 194-210, 1999. + * But for this we need precise liveness, on each %phi and not only on OP_PHI's + * target pseudos. * * Copyright (C) 2005 Luc Van Oostenryck */ -- 2.11.4.GIT